sewingmachine;缝纫机
internal-combustionengine;内燃机
passengerplane;客机
transportplane;airfreighter运输机
aturningpoint;aturnforthebetter转机
takeadvantageoftheoccasion;seizetheopportunity[chance];趁机
doasoneseesfit;useone'sdiscretion;见机行事
inorganicchemistry;无机化学
organism有机体
JiSi机汜
adroit;ingenious机巧